CN114946142A

CN114946142A - Method and apparatus for transmitting feedback information

Info

Publication number: CN114946142A
Application number: CN202080092924.2A
Authority: CN
Inventors: 石靖; 郝鹏; 苟伟; 张晨晨; 张峻峰
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2020-02-14
Filing date: 2020-02-14
Publication date: 2022-08-26
Also published as: WO2021093209A1; KR20220139303A; EP4088404A4; EP4088404A1; US20230011110A1

Abstract

Methods, systems, and devices for a communication node to transmit feedback information are described. The method comprises the following steps: in response to a preset rule being satisfied, a hybrid automatic repeat request-acknowledgement (HARQ-ACK) is sent.

Description

Method and apparatus for transmitting feedback information

Technical Field

The present disclosure is generally directed to wireless communications. In particular, the present disclosure relates to methods and apparatus for transmitting feedback information.

Background

Wireless communication technology is pushing the world to an increasingly interconnected and networked society. High speed and low latency wireless communications rely on efficient network resource management and allocation between user equipment and radio access network nodes, including but not limited to radio base stations. New generation networks are expected to provide high speed, low latency and ultra-reliable communication capabilities and meet the demands from different industries and users. Ultra-reliable low-delay communication (URLLC) can provide high reliability and low delay of communication between user equipment and radio access network nodes. URLLC may be supported on licensed frequency carriers and/or unlicensed frequency carriers. There are some problems and challenges associated with transmitting feedback information, such as how to improve the performance of transmitting feedback information. The present disclosure may address at least some of the problems associated with existing systems to improve the performance of wireless communications.

Disclosure of Invention

The present application relates to methods, systems, and devices for wireless communication, and more particularly, to methods, systems, and devices for transmitting feedback information.

In one embodiment, the present disclosure describes a method for transmitting feedback information by a communication node. The method comprises the following steps: in response to a preset rule being satisfied, a hybrid automatic repeat request-acknowledgement (HARQ-ACK) is sent.

In some other embodiments, an apparatus for wireless communication may include a memory storing instructions and processing circuitry in communication with the memory. When the processing circuitry executes the instructions, the processing circuitry is configured to perform the above-described method.

In some other embodiments, an apparatus for wireless communication may include a memory storing instructions and processing circuitry in communication with the memory. When the processing circuit executes the instructions, the processing circuit is configured to perform the above-described method.

In some other embodiments, a computer-readable medium includes instructions that, when executed by a computer, cause the computer to perform the above-described method.

The above and other aspects and embodiments thereof are described in more detail in the accompanying drawings, the description and the claims.

Drawings

Figure 1 shows an example of a wireless communication system comprising one radio network node and one or more user equipments.

Fig. 2 shows an example of a network node.

Fig. 3 shows an example of a user equipment.

Fig. 4 shows a flow chart of a method for wireless communication.

Fig. 5A illustrates an exemplary embodiment of transmitting feedback information.

Fig. 5B illustrates another exemplary embodiment of transmitting feedback information.

Fig. 5C illustrates another exemplary embodiment of transmitting feedback information.

Fig. 5D illustrates another exemplary embodiment of transmitting feedback information.

Fig. 5E illustrates another exemplary embodiment of transmitting feedback information.

Fig. 5F illustrates another example embodiment of transmitting feedback information.

Fig. 5G illustrates another example embodiment of transmitting feedback information.

Fig. 5H illustrates another exemplary embodiment of transmitting feedback information.

Fig. 5I illustrates another exemplary embodiment of transmitting feedback information.

Fig. 5J illustrates another exemplary embodiment of transmitting feedback information.

Fig. 5K illustrates another exemplary embodiment of transmitting feedback information.

Fig. 5L illustrates another exemplary embodiment of transmitting feedback information.

Detailed Description

The present disclosure will now be described in detail hereinafter with reference to the accompanying drawings, which form a part hereof, and which show, by way of illustration, specific examples of embodiments. It should be noted, however, that the present disclosure may be embodied in various different forms and, thus, it is intended that the covered or claimed subject matter be construed as not being limited to any embodiment set forth below.

Throughout the specification and claims, terms may have, in addition to their explicitly stated meanings, subtle meanings suggested or implied by context. Likewise, the phrases "in one embodiment" or "in some embodiments" as used herein do not necessarily refer to the same embodiment, and the phrases "in another embodiment" or "in other embodiments" as used herein do not necessarily refer to a different embodiment. The phrase "in one embodiment" or "in some embodiments" as used herein does not necessarily refer to the same embodiment, and the phrase "in another embodiment" or "in other embodiments" as used herein does not necessarily refer to a different embodiment. For example, the claimed subject matter is intended to include, in whole or in part, the exemplary embodiments or combinations of embodiments.

In general, terms may be understood at least in part according to usage in context. For example, terms such as "and," "or," "and/or," as used herein may include various meanings that may depend at least in part on the context in which the terms are used. Typically, if "or" is used to associate a list such as A, B or C, it is intended to mean A, B and C, which are used herein in an inclusive sense, and A, B or C, which are used herein in an exclusive sense. In addition, the terms "one or more" or "at least one," as used herein, may be used to describe any feature, structure, or characteristic in the singular or may be used to describe a combination of features, structures, or characteristics in the plural, depending, at least in part, on the context. Similarly, terms such as "a," "an," or "the" may also be understood to convey a singular use or to convey a plural use, depending, at least in part, on the context. Additionally, the term "based on" or "determined by …" may be understood as not necessarily intended to convey an exclusive set of factors, but may allow for the presence of additional factors not necessarily expressly described, again depending at least in part on the context.

The present disclosure describes methods and apparatus for transmitting feedback information, in particular hybrid automatic repeat request-acknowledgement (HARQ-ACK).

New Generation (NG) mobile communication systems are pushing the world to increasingly interconnected and networked society. High speed and low latency wireless communications rely on efficient network resource management and allocation between user equipment and radio access network nodes, including but not limited to radio base stations. New generation networks are expected to provide high speed, low latency and ultra-reliable communication capabilities and meet the demands from different industries and users. Ultra-reliable low-delay communication (URLLC) can provide high reliability and low delay of communication between user equipment and radio access network nodes. To increase bandwidth, shorten latency, and/or increase speed, wireless communication may be conducted over a licensed frequency band and/or a new air interface unlicensed (NR-U) frequency band.

In a fifth generation (5G) communication system on a licensed frequency carrier, the URLLC service may configure one or more subslots within a time slot. Each of the one or more sub-slots may be configured to transmit feedback information to reduce delay in URLLC service on the licensed carrier.

In a fifth generation (5G) communication system on an NR-U frequency carrier, there is a problem in that the time required for transmitting feedback information is increased, thereby increasing delay and deteriorating performance of the communication system on the NR-U frequency carrier. For example, one problem may be that when a User Equipment (UE) cannot transmit feedback information within a corresponding Channel Occupancy Time (COT) (e.g., due to a failure to successfully contend for a resource channel for transmitting the feedback information), a non-value of K1 may indicate that the UE stores HARQ-ACKs corresponding to a Physical Downlink Shared Channel (PDSCH), and the UE may wait to transmit the HARQ-ACKs until a value of K1 is indicated in received Downlink Control Information (DCI), which causes a long delay and increases a delay for transmitting the feedback information.

The present disclosure describes methods and apparatus for transmitting feedback information (e.g., HARQ-ACK). In some embodiments, the present disclosure may improve the efficiency of transmitting HARQ-ACKs for URLLC services on NR-U carriers. In some embodiments, in some cases, when the HARQ-ACK is excessively delayed, the present disclosure may determine that the UE may not transmit the delayed HARQ-ACK in order to save Physical Uplink Control Channel (PUCCH) resources.

Fig. 1 shows a wireless communication system 100 that includes a radio network node 118 and one or more User Equipments (UEs) 110. The radio network node may comprise a network base station, which may be a nodeB (NB, e.g. a gNB) in a mobile telecommunications environment. Each UE may wirelessly communicate with a wireless network node via one or more wireless channels 115. For example, the first UE 110 may wirelessly communicate with the radio network node 118 via a channel comprising a plurality of radio channels during a particular time period. The network base station 118 may transmit Downlink Control Information (DCI) to the user equipment 110, and the DCI may include information indicating how the UE may transmit the feedback information. The feedback information may include HARQ-ACK.

Fig. 2 shows an example of an electronic device 200 implementing a network base station. The example electronic device 200 may include wireless transmit/receive (Tx/Rx) circuitry 208 to transmit/receive communications with UEs and/or other base stations. The electronic device 200 may also include network interface circuitry 209 to communicate the base station with other base stations and/or a core network, such as an optical or wired interconnection, an ethernet network, and/or other data transmission media/protocols. The electronic device 200 may optionally include an input/output (I/O) interface 206 to communicate with an operator or such personnel.

The electronic device 200 may also include system circuitry 204. The system circuitry 204 may include a processor 221 and/or a memory 222. Memory 222 may include an operating system 224, instructions 226, and parameters 228. The one or more processors 124 may be configured with instructions 226 to perform the functions of the network node. Parameters 228 may include parameters that support execution of instructions 226. For example, the parameters may include network protocol settings, bandwidth parameters, radio frequency mapping assignments, and/or other parameters.

Fig. 3 shows an example of an electronic device implementing a terminal device 300, e.g., a User Equipment (UE). The UE 300 may be a mobile device, such as a smart phone or a mobile communication module provided in a vehicle. The UE 300 may include a communication interface 302, system circuitry 304, input/output interfaces (I/O)306, display circuitry 308, and storage 309. The display circuitry may include a user interface 310. System circuitry 304 may include any combination of hardware, software, firmware, or other logic/circuitry. System circuitry 304 may be implemented using, for example, one or more systems on a chip (SoC), Application Specific Integrated Circuits (ASIC), discrete analog and digital circuits, and other circuitry. The system circuitry 304 may be part of an implementation of any desired functionality in the UE 300. In this regard, the system circuitry 304 may include logic to facilitate decoding and playing music and video (e.g., MP3, MP4, MPEG, AVI, FLAC, AC3, or WAV decoding and playback), for example; running the application; accepting user input; storing and retrieving application data; establishing, maintaining and terminating a cellular telephone call or data connection, such as for making an internet connection; establishing, maintaining, and terminating wireless network connections, bluetooth connections, or other connections; and displaying the relevant information on the user interface 310. The user interface 310 and input/output (I/O) interface 306 may include graphical user interfaces, touch-sensitive displays, haptic feedback or other haptic outputs, voice or facial recognition inputs, buttons, switches, speakers, and other user interface elements. Additional examples of I/O interfaces 306 may include microphones, video and still image cameras, temperature sensors, vibration sensors, rotation and orientation sensors, headphones and microphone input/output jacks, Universal Serial Bus (USB) connectors, memory card slots, radiation sensors (e.g., IR sensors), and other types of inputs.

Referring to fig. 3, the communication interface 302 may include Radio Frequency (RF) transmit (Tx) and receive (Rx) circuitry 316 that handles the transmission and reception of signals through one or more antennas 314. The communication interface 302 may include one or more transceivers. The transceiver may be a wireless transceiver that includes modulation/demodulation circuitry, digital-to-analog converters (DACs), shaping tables, analog-to-digital converters (ADCs), filters, waveform shapers, filters, preamplifiers, power amplifiers, and/or other logic for transmitting and receiving over one or more antennas or, for some devices, over a physical (e.g., wired) medium. The transmitted and received signals may conform to any of a variety of formats, protocols, modulations (e.g., QPSK, 16-QAM, 64-QAM, or 256-QAM), channels, bit rates, and codes. As one particular example, the communication interface 302 may include transceivers that support transmission and reception under 2G, 3G, BT, WiFi, Universal Mobile Telecommunications System (UMTS), High Speed Packet Access (HSPA) +, 4G/Long Term Evolution (LTE), and 5G standards. However, the techniques described below are applicable to other wireless communication technologies, whether sourced from the third generation partnership project (3GPP), the GSM association, 3GPP2, IEEE, or other partners or standards bodies.

Referring to fig. 3, the system circuitry 304 may include one or more processors 321 and memory 322. Memory 322 stores, for example, operating system 324, instructions 326, and parameters 328. The processor 321 is configured to execute the instructions 326 to perform desired functions for the UE 300. Parameters 328 may provide and specify configuration and operational options for instructions 326. Memory 322 may also store any BT, WiFi, 3G, 4G, 5G, or other data that UE 300 will transmit over communication interface 302 or has received. In various embodiments, the system power of the UE 300 may be supplied by a power storage device (such as a battery or transformer).

The present disclosure describes several embodiments which may be partially or fully implemented on the network base station and/or user equipment described above.

Referring to fig. 4A, the present disclosure describes an embodiment of a method 400 for transmitting feedback information. The method 400 may include the step 410: transmitting, by the user equipment, a hybrid automatic repeat request-acknowledgement (HARQ-ACK) in response to a preset rule being satisfied. In one embodiment, the HARQ-ACK may be sent by the user equipment to a network base station (e.g., a gNB).

In some embodiments, the preset rule may include whether a HARQ-ACK is transmitted by the user equipment. In one embodiment, the user equipment may determine whether a preset rule is satisfied; and in response to determining that the preset rule is satisfied, the user equipment may carry the HARQ-ACK using Physical Uplink Control Channel (PUCCH) resources.

Referring to fig. 5A-5L, a User Equipment (UE) may receive first downlink control information (first DCI or DCI-1) 510. The first DCI (DCI-1)510 may include a first K1(K1-1) 512. The UE may receive corresponding first information from the network base station over a first physical downlink shared channel (first PDSCH information or PDSCH1) 514. A first physical uplink control channel (first PUCCH resource or PUCCH1)516 may correspond to PDSCH 1514. The value K1 may indicate the scheduling timing between the PDSCH and the corresponding PUCCH. For example, there may be K1 slots (or subslots) between PUCCH 1516 and PDSCH 1514. In some embodiments, PUCCH 1516, PUCCH 2526 and PUCCH 3536 may be pre-configured to transmit feedback information, and when a UE successfully contends for one PUCCH resource, the UE may transmit a corresponding HARQ-ACK on the successfully contended PUCCH resource. For example, when the UE successfully contends for PUCCH1 between PUCCH1, PUCCH2, and PUCCH3, the UE may transmit a corresponding HARQ-ACK on PUCCH 1.

The second DCI (DCI-2)520 may include a second K1(K1-2) 522. The UE may receive second PDSCH information (PDSCH2)524 from the network base station. The second PUCCH resource (PUCCH2)526 may correspond to PDSCH 2524. The third DCI (DCI-3)530 may include a third K1(K1-3) 532. The UE may receive third PDSCH information (PDSCH3)534 from the network base station. The third PUCCH resource (PUCCH3)536 may correspond to PDSCH 3534.

K1 in DCI may be a non-numeric value. For example, referring to fig. 5A, the first K1(K1-1) in the first DCI may be a non-numerical value K1. The base station configures a non-numerical value K1 in the DCI to inform the UE to store the HARQ-ACK. After receiving the first DCI and the first PDSCH information, the UE may store HARQ-ACK corresponding to the reception of the first PDSCH information.

K1 in DCI may be a numerical value. For example, referring to fig. 5B, the first K1(K1-1) in DCI-1 may be the value K1. The value K1 may indicate the scheduling timing between the PDSCH and the corresponding PUCCH. For example, there may be K1-1 slots (or subslots) between PUCCH 1516 and PDSCH 1514.

In some embodiments referring to fig. 5A, where K1-1 is a non-numeric value K1, the UE may contend for PUCCH resources among at least one configured PUCCH resource (e.g., among PUCCH1, PUCCH2, and/or PUCCH 3). After successful completion of contention, for example, the UE may select the first successfully contended resource and use the first successfully contended resource to carry the HARQ-ACK. For example, when PUCCH 1516 is the first successfully contended resource, the UE may use PUCCH 1516 to carry HARQ-ACKs. In another embodiment, when the UE has stored HARQ-ACKs as stored HARQ-ACKs, the UE may use PUCCH 1516 to carry the stored HARQ-ACKs.

In some embodiments referring to fig. 5B, where K1-1 is the value K1, the UE may use the configured PUCCH 1516 to carry HARQ-ACKs. Optionally and/or alternatively, the UE may also contend for PUCCH resources among the at least one configured PUCCH resource (e.g., between PUCCH1, PUCCH2, and/or PUCCH 3). After successful completion of contention, for example, the UE may select the first successfully contended resource and use the first successfully contended resource to carry the HARQ-ACK. For example, when PUCCH 1516 is the first successfully contended resource, the UE may use PUCCH 1516 to carry HARQ-ACKs.

In some embodiments referring to fig. 5C, where K1-1 is a non-numerical value K1, the UE may store HARQ-ACKs corresponding to receiving the first PDSCH information. The UE may receive a second DCI (DCI-2). DCI-2 may include a value K1-2. The UE may send the stored HARQ-ACK on a second PUCCH resource (PUCCH 2). PUCCH2 may correspond to the value K1-2. In some embodiments, as shown in fig. 5A, the UE may send a HARQ-ACK on the first successfully contended resource (e.g., on PUCCH1) among the at least one configured PUCCH resource, and then, as shown in fig. 5C, the UE may send the HARQ-ACK again on PUCCH 2.

In some embodiments referring to fig. 5D, the UE may receive a second DCI (DCI-2) including a value K1-2 and a feedback flag. Optionally, in some embodiments, the previous DCI received by the UE may be DCI-1 including non-value K1, and the UE may store a HARQ-ACK corresponding to receiving the first PDSCH information.

The feedback flag may indicate whether the UE transmits the stored HARQ-ACK. The UE may determine whether the feedback flag is equal to a preset enable value or a preset disable value. In response to the feedback flag in the DCI-2 being a preset enable value, the UE may send the stored HARQ-ACK on a second PUCCH resource (PUCCH 2). PUCCH2 may correspond to value K1-2. In response to the feedback flag in DCI-2 being the preset de-enable value, the UE may not send the stored HARQ-ACK on PUCCH 2. For example, but not limiting of, the UE may wait for the next DCI including the value K1 and the feedback flag that is the preset enable value to send the stored HARQ-ACK; otherwise, if the feedback flag is the preset disable value, the UE may remove the stored HARQ-ACK and/or not send the stored HARQ-ACK. For example, but not limiting of, in one embodiment, the preset enable value may be 1, and the preset disable value may be 0; or in another embodiment, the preset enable value may be 0 and the preset disable value may be 1. In some embodiments, as shown in fig. 5A, the UE may transmit HARQ-ACK on the first successfully contended resource (e.g., on PUCCH1) among the at least one configured PUCCH resource, and then, as shown in fig. 5D, when feedback is enabled by the feedback flag in DCI-2, the UE may again transmit HARQ-ACK on PUCCH 2.

In some embodiments referring to fig. 5D, DCI-2 may include K1-2 and a priority indication. K1-2 may be the value K1. The priority indication may indicate whether it is of high priority for the UE to send the stored HARQ-ACK. The UE may determine whether the feedback flag is equal to the high priority value or the low priority value. In response to the priority indication in DCI-2 being a high priority value, the UE may send the stored HARQ-ACK on a second PUCCH resource (PUCCH 2). PUCCH2 may correspond to the value K1-2. In response to the priority indication in DCI-2 being a low priority value, the UE may not send the stored HARQ-ACK on PUCCH 2. For example, but not limiting of, the UE may wait for the next DCI, including the value K1 and the correct feedback flag, to send the stored HARQ-ACK; or the UE may remove the stored HARQ-ACK and/or not transmit the stored HARQ-ACK. For example, but not limiting of, in one embodiment, the high priority value may be 1 and the low priority value may be 0; or, in another embodiment, there may be a preset priority threshold, and when the priority indication is greater than the preset priority threshold, the UE determines that the priority indication is high priority, and when the priority indication is not greater than the preset priority threshold, the UE determines that the priority indication is low priority.

In some embodiments referring to FIG. 5E, a User Equipment (UE) may receive DCI-1 including K1-1. K1-1 may include a non-numerical value K1 or a numerical value K1. Two PUCCH carriers may be configured for the corresponding PDSCH. In one embodiment, two PUCCH resources (516 and 518) may be configured corresponding to PDSCH 1. One of the two configured PUCCH resources is a PUCCH resource configured on an unlicensed carrier (PUCCH 1516); and the other of the two configured PUCCH resources is a PUCCH resource configured on a licensed carrier (PUCCH 1518).

When two PUCCH resources are configured corresponding to one PDSCH information, the base station may configure or inform the UE to select one of the configured two PUCCH resources.

In one embodiment, DCI sent by a base station to a UE may include a feedback carrier selection flag. The feedback carrier selection flag may indicate which of the two configured PUCCH resources the UE selects to send the HARQ-ACK. The UE may determine whether the feedback carrier selection flag is equal to a preset authorized carrier enable value or a preset unauthorized carrier enable value. In response to the feedback carrier selection flag in the received DCI being a preset authorized carrier enable value, the UE may select and use the PUCCH resource on the authorized carrier to send the HARQ-ACK. And in response to the feedback carrier selection flag being equal to the preset unlicensed carrier enabling value, the UE can select and use PUCCH resources on the unlicensed carrier to send the HARQ-ACK. For example, but not limited to, in one embodiment, the preset authorized carrier enable value may be 1, and the preset unauthorized carrier enable value may be 0; or in another embodiment, the preset authorized carrier enable value may be 0, and the preset unauthorized carrier enable value may be 1.

In another embodiment, the DCI sent by the base station to the UE may include a priority indication. The priority indication may indicate which of the two configured PUCCH resources the UE selects to send the HARQ-ACK. The UE may determine whether the priority indication is equal to a high priority value or a low priority value. In response to the priority indication in the received DCI being high priority, the UE may select and use PUCCH resources on the licensed carrier to transmit the HARQ-ACK. In response to the priority indication being equal to the low priority value, the UE may select and use PUCCH resources on the unlicensed carrier to send the HARQ-ACK. For example, but not limiting of, in one embodiment, the high priority value may be 1 and the low priority value may be 0; alternatively, in another embodiment, there may be a preset priority threshold, and when the priority indication is greater than the preset priority threshold, the UE may determine that the priority indication is a high priority value, and when the priority indication is not greater than the preset priority threshold, the UE may determine that the priority indication is a low priority value.

In some embodiments, when the communication system transmits data using URLLC on an NR-U frequency carrier, under certain conditions, e.g., when HARQ-ACK is excessively delayed compared to a preset requirement, the communication system may determine not to transmit HARQ-ACK in order to save UCI or PUCCH resources, thereby improving the performance of URLLC. Various embodiments are described in which a wireless communication system determines whether a UE transmits a corresponding HARQ-ACK.

In some embodiments, the preset rule in the method 400 may include whether a feedback flag in the received DCI is equal to a preset value. When the feedback flag is equal to the preset value, the UE may send a corresponding HARQ-ACK. When the feedback flag is not equal to the preset value, the UE may not transmit the corresponding HARQ-ACK. For example, but not limiting of, the UE may wait for the next DCI, including the value K1 and the appropriate feedback flag, to send the corresponding HARQ-ACK; or the UE may remove the corresponding HARQ-ACK and/or not transmit the corresponding HARQ-ACK. For example, but not limiting of, in one embodiment, the preset value may be 1; or in another embodiment, the preset value may be 0.

In one embodiment referring to fig. 5F, the DCI-2520 may include a value K1-2 and a feedback flag 521, the feedback flag 521 indicating whether the UE transmits a corresponding HARQ-ACK. In one embodiment, the corresponding HARQ-ACK may be a HARQ-ACK stored by the UE as a stored HARQ-ACK according to the PDSCH1 scheduled corresponding to the previously received DCI (DCI-1). DCI-1 may include a non-numerical value K1. When the feedback flag is equal to the preset value, the UE may send the stored HARQ-ACK on PUCCH 2. When the feedback flag is not equal to the preset value, the UE may not send the stored HARQ-ACK on PUCCH 2.

In some embodiments, the preset rule in the method 400 may include whether the value K1 in the received DCI is less than a preset threshold or belongs to a set of preset values. When the value K1 in the received DCI is smaller than the preset threshold or belongs to the set of preset values, the UE may send a corresponding HARQ-ACK. When the value K1 in the received DCI is not less than the preset threshold and does not belong to the set of preset values, the UE may not send the corresponding HARQ-ACK. For example, but not limiting of, the UE may wait for the next DCI including the value K1 and the appropriate value K1 to transmit the corresponding HARQ-ACK; or the UE may remove the corresponding HARQ-ACK and/or not transmit the corresponding HARQ-ACK. For example, but not limiting of, in one embodiment, the preset threshold may be 3, 5, or 10; and the set of preset values may include one or more preset values, such as {0}, {0, 1}, or {0, 1, 2, 3, 4, 5 }.

In one embodiment referring to FIG. 5C, the DCI-2520 may include the value K1-2. In response to the value K1-2 being less than a preset threshold or belonging to a set of preset values, the UE may transmit HARQ-ACK corresponding to PDSCH1 on PUCCH 2. In response to the value K1-2 not being less than the preset threshold and not belonging to a set of preset values, the UE may not send a HARQ-ACK corresponding to PDSCH1 on PUCCH 2. In another embodiment, the previously received DCI (DCI-1) may include a non-value K1-1 and the corresponding HARQ-ACK may be a HARQ-ACK stored by the UE according to PDSCH 1.

In some embodiments, the preset rules in the method 400 may include whether the scheduling DCI includes a K1-deadline (K1-deadline) and whether a PUCCH resource carrying a HARQ-ACK is no later than another PUCCH resource corresponding to a K1-deadline. When the PUCCH resource carrying HARQ-ACK is not later than another PUCCH resource corresponding to K1-deadline in the scheduling DCI, the UE may send the corresponding HARQ-ACK. When the PUCCH resource carrying HARQ-ACK is later than another PUCCH resource corresponding to K1-deadline in the scheduling DCI, the UE may not send the corresponding HARQ-ACK. For example, and without limitation, the UE may remove the corresponding HARQ-ACK and/or not transmit the corresponding HARQ-ACK.

In some embodiments referring to fig. 5G-5H, DCI-1510 may include non-numeric values K1-1512 and K1-deadline 511. K1-the deadline may indicate whether the UE sends the corresponding HARQ-ACK. In one embodiment, the corresponding HARQ-ACK may be a HARQ-ACK stored by the UE according to PDSCH1, which PDSCH1 is scheduled by DCI-1 including non-value K1-1. DCI-2 may include a value K1-2, and PUCCH2 corresponds to PDSCH2 based on the value K1-2. In one embodiment, as shown in fig. 5G, the UE may send the stored HARQ-ACK on PUCCH2 when PUCCH2 is not later in time than the PUCCH resource corresponding to the K1-deadline. In another embodiment, as shown in fig. 5H, when PUCCH2 is later in time than the PUCCH resource corresponding to K1-deadline, the UE may not send the stored HARQ-ACK on PUCCH 2.

In other embodiments referring to fig. 5I-5J, DCI-1510 may include values K1-1512 and K1-deadline 511. K1-the deadline may indicate whether the UE sends the corresponding HARQ-ACK. In one embodiment, PUCCH1 based on the value K1-1 may fail during resource contention and the corresponding HARQ-ACK may be stored for transmission on a later PUCCH resource. The UE may receive DCI-2 including a value K1-2, and PUCCH2 corresponds to PDSCH2 based on the value K1-2. In one embodiment, as shown in fig. 5I, the UE may send the stored HARQ-ACK on PUCCH2 when PUCCH2 succeeds in resource contention and is not later in time than the PUCCH resource corresponding to K1-deadline. In another embodiment, as shown in fig. 5J, when PUCCH2 is later in time than the PUCCH resource corresponding to K1-deadline, the UE may not send the stored HARQ-ACK on PUCCH 2.

In some embodiments, the preset rule in method 400 may include whether a time interval between a PUCCH resource (or Physical Uplink Shared Channel (PUSCH) resource) configured to carry a HARQ-ACK and a PDSCH corresponding to the HARQ-ACK is not greater than a preset interval threshold. When a time interval between a PUCCH resource (or PUSCH resource) configured to carry the HARQ-ACK and a PDSCH corresponding to the HARQ-ACK is not greater than a preset interval threshold, the UE may transmit the corresponding HARQ-ACK on the PUCCH resource (or PUSCH resource). When a time interval between a PUCCH resource (or PUSCH resource) configured to carry HARQ-ACK and a PDSCH corresponding to HARQ-ACK is greater than a preset interval threshold, the UE may not transmit the corresponding HARQ-ACK. For example, and without limitation, the UE may remove the corresponding HARQ-ACK and/or not transmit the corresponding HARQ-ACK.

In one embodiment referring to fig. 5K, DCI-1510 may include non-numeric values K1-1512. The preset interval threshold may be configured by DCI received from the network base station or by Radio Resource Control (RRC) based on the network base station. In one embodiment, the corresponding HARQ-ACK may be a HARQ-ACK stored by the UE according to PDSCH1, which PDSCH1 is scheduled by DCI-1 containing a non-numeric value of K1-1. DCI-2 may include a value K1-2, and PUCCH2 corresponds to PDSCH2 based on the value K1-2. Time interval 590 may be between PUCCH2 configured to carry HARQ-ACK and PDSCH1 corresponding to HARQ-ACK. When the time interval 590 is not greater than the preset interval threshold, the UE may send the stored HARQ-ACK on PUCCH 2. When time interval 590 is greater than a preset interval threshold, the UE may not send the stored HARQ-ACK on PUCCH 2. In another embodiment, PUSCH2 may be configured to carry HARQ-ACKs. Time interval 590 may be between PUSCH2 and PDSCH 1. When the time interval 590 is not greater than the preset interval threshold, the UE may send the stored HARQ-ACK on PUSCH 2. When the time interval 590 is greater than a preset interval threshold, the UE may not send the stored HARQ-ACK on PUSCH 2.

In some embodiments, the preset rule in the method 400 may include whether a time interval between a PUCCH resource (or PUSCH resource) configured to carry HARQ-ACK and a PDCCH for scheduling PDSCH corresponding to HARQ-ACK is not greater than a preset interval threshold. When a time interval between a PUCCH resource (or PUSCH resource) configured to carry the HARQ-ACK and a PDCCH based on the PDSCH corresponding to the HARQ-ACK is not greater than a preset interval threshold, the UE may transmit the corresponding HARQ-ACK on the PUCCH resource (or PUSCH resource). When a time interval between a PUCCH resource (or PUSCH resource) configured to carry HARQ-ACK and a PDCCH based on a PDSCH corresponding to HARQ-ACK is greater than a preset interval threshold, the UE may not transmit the corresponding HARQ-ACK. For example, and without limitation, the UE may remove the corresponding HARQ-ACK and/or not transmit the corresponding HARQ-ACK.

Referring to fig. 5K, DCI-1510 may include non-numeric values K1-1512. In one embodiment, the corresponding HARQ-ACK may be a HARQ-ACK stored by the UE according to PDSCH1, which PDSCH1 is scheduled by DCI-1 including non-value K1-1. PDCCH 1515 may be configured based on PDSCH 1. DCI-2 may include a value K1-2, and PUCCH2 corresponds to PDSCH2 based on the value K1-2. Time interval 590 may be between PUCCH2 configured to carry HARQ-ACK and PDCCH1 based on PDSCH1 corresponding to HARQ-ACK. When the time interval 590 is not greater than the preset interval threshold, the UE may send the stored HARQ-ACK on PUCCH 2. When time interval 590 is greater than a preset interval threshold, the UE may not send the stored HARQ-ACK on PUCCH 2. In another embodiment, PUSCH2 may be configured to carry HARQ-ACKs. Time interval 590 may be between PUSCH2 and PDCCH 1. When the time interval 590 is not greater than the preset interval threshold, the UE may send the stored HARQ-ACK on PUSCH 2. When the time interval 590 is greater than a preset interval threshold, the UE may not send the stored HARQ-ACK on PUSCH 2.

In another embodiment referring to FIG. 5L, DCI-1510 may include the values K1-1512. The preset interval threshold may be configured by DCI received from the network base station or by Radio Resource Control (RRC) based on the network base station. In one embodiment, PUCCH1 based on value K1-1 may fail during resource contention and the corresponding HARQ-ACK may be stored for transmission on later PUCCH or PUSCH resources. The UE may receive DCI-2 including a value K1-2, and PUCCH2 or PUSCH2 corresponds to PDSCH2 based on the value K1-2. The time interval 590 may be between PUCCH2 or PUSCH2 configured to carry HARQ-ACKs and PDSCH1 corresponding to HARQ-ACKs. When the time interval 590 is not greater than the preset interval threshold, the UE may transmit the stored HARQ-ACK on PUCCH2 or PUSCH 2. When the time interval 590 is greater than a preset interval threshold, the UE may not transmit the stored HARQ-ACK on PUCCH2 or PUSCH 2. In another embodiment, PDCCH 1515 may be configured based on PDSCH 1. The time interval 590 may be between PUCCH2 or PUSCH2 and PDCCH 1. When the time interval 590 is not greater than the preset interval threshold, the UE may transmit the stored HARQ-ACK on PUCCH2 or PUSCH 2. When the time interval 590 is greater than a preset interval threshold, the UE may not transmit the stored HARQ-ACK on PUCCH2 or PUSCH 2.

The present disclosure describes methods, apparatuses, and computer-readable media for wireless communication. The present disclosure addresses the problem of transmitting feedback information. The methods, devices, and computer readable media described in this disclosure may facilitate performance of URLLC transmissions between user equipment and a base station, thereby improving efficiency and overall performance. The methods, apparatus, and computer readable media described in this disclosure may improve the overall efficiency of a wireless communication system.

Reference throughout this specification to features, advantages, or similar language does not imply that all of the features and advantages that may be realized with the present solution should be or are in any single embodiment thereof. Rather, language referring to the features and advantages is understood to mean that a specific feature, advantage, or characteristic described in connection with an embodiment is included in at least one embodiment of the present solution. Thus, discussion of the features and advantages, and similar language, throughout this specification may, but do not necessarily, refer to the same embodiment.

Furthermore, the described features, advantages, and characteristics of the solution may be combined in any suitable manner in one or more embodiments. One skilled in the relevant art will recognize, in light of the description herein, that the present solution may be practiced without one or more of the specific features or advantages of a particular embodiment. In other instances, additional features and advantages may be recognized in certain embodiments that may not be present in all embodiments of the solution.

Claims

1. A method for transmitting feedback information by a communication node, comprising:

in response to a preset rule being satisfied, a hybrid automatic repeat request-acknowledgement (HARQ-ACK) is sent.

2. The method of claim 1, wherein:

the preset rule comprises whether HARQ-ACK is generated or not; and

the communication node comprises a user equipment.

3. The method of claim 2, wherein transmitting HARQ-ACK comprises:

carrying HARQ-ACK using a Physical Uplink Control Channel (PUCCH) resource, wherein the PUCCH resource is a first contention-successful resource among at least one configured PUCCH resource.

4. The method of claim 3, wherein:

the HARQ-ACK comprises a stored HARQ-ACK; and is

The method further comprises the following steps: receiving, by the user equipment, Downlink Control Information (DCI) comprising a value K1 and a feedback flag in the DCI indicating whether to transmit the stored HARQ-ACK.

5. The method of claim 4, wherein transmitting the HARQ-ACK message further comprises:

in response to the feedback flag in the DCI being a preset enable value, the user equipment sends the stored HARQ-ACK on the PUCCH resource corresponding to the value K1; and is

And in response to the feedback flag in the DCI being a preset de-enable value, removing the stored HARQ-ACK by the user equipment.

6. The method of claim 4, wherein transmitting HARQ-ACK comprises:

receiving, by the user equipment, Downlink Control Information (DCI) comprising a value K1 and a priority indication indicating whether to transmit the stored HARQ-ACK.

7. The method of claim 6, wherein transmitting the HARQ-ACK further comprises:

transmitting, by the user equipment, the stored HARQ-ACK on a PUCCH resource corresponding to a value of K1 in response to a priority indication in the DCI being a high priority value; and is provided with

Removing, by the user equipment, the stored HARQ-ACK in response to the priority indication in the DCI being a low priority value.

8. The method of claim 2, wherein transmitting the HARQ-ACK comprises:

HARQ-ACK is carried using a PUCCH resource selected from the configured at least two PUCCH resources.

9. The method of claim 2, wherein:

HARQ-ACKs corresponding to a scheduled Physical Downlink Shared Channel (PDSCH) are configured in at least two cells for PUCCH transmission.

10. The method of claim 8, wherein:

one of the two configured PUCCH resources is a PUCCH resource configured on a licensed carrier; and is

The other of the two configured PUCCH resources is a PUCCH resource configured on an unlicensed carrier.

11. The method of claim 10, wherein transmitting HARQ-ACK comprises:

receiving, by the user equipment, Downlink Control Information (DCI) including a feedback carrier selection flag in the DCI indicating which of two PUCCH resources configured are selected for transmission of HARQ-ACK.

12. The method of claim 11, wherein transmitting HARQ-ACK further comprises:

responding to the feedback carrier selection mark in the DCI as a preset authorized carrier enabling value, and transmitting HARQ-ACK on the configured PUCCH resource on the authorized carrier by the user equipment; and

and responding to the feedback carrier selection mark in the DCI as a preset unauthorized carrier enabling value, and transmitting HARQ-ACK on the configured PUCCH resources on the unauthorized carrier by the user equipment.

13. The method of claim 10, wherein transmitting the HARQ-ACK comprises:

receiving, by the user equipment, Downlink Control Information (DCI) including a priority indication, the priority indication in the DCI indicating a selection of one of the two configured PUCCH resources for transmission of HARQ-ACK.

14. The method of claim 13, wherein transmitting HARQ-ACK further comprises:

transmitting, by the user equipment, a HARQ-ACK on the configured PUCCH resources on a licensed carrier in response to the priority indication in the DCI being a high priority value; and is

Transmitting, by the user equipment, a HARQ-ACK on the configured PUCCH resources on an unlicensed carrier in response to the priority indication in the DCI being a low priority value.

15. The method of claim 1, further comprising:

the preset rule is whether a feedback mark in the received DCI is equal to a preset value.

16. The method of claim 15, wherein:

the received DCI includes a value K1; and is

The HARQ-ACK includes a stored HARQ-ACK corresponding to a Physical Downlink Shared Channel (PDSCH) scheduled according to a previously received DCI including a non-value K1.

17. The method of claim 15, wherein:

the preset value is equal to 1 or equal to 0.

18. The method of claim 1, further comprising:

the preset rule is whether the value K1 in the received DCI is smaller than a preset threshold or belongs to a set of preset values.

19. The method of claim 18, wherein:

the set of preset values includes one or more values.

20. The method of claim 1, wherein:

the preset rule is as follows: the scheduling DCI includes K1-deadline (K1-deadline), and a PUCCH resource carrying the HARQ-ACK is no later than another PUCCH resource corresponding to K1-deadline.

21. The method of claim 20, wherein:

the DCI includes a non-numeric value K1; and is

The HARQ-ACK includes a stored HARQ-ACK of a Physical Downlink Shared Channel (PDSCH) scheduled according to the DCI.

22. The method of claim 1, wherein:

the preset rules include: whether a time interval between a PUCCH resource or a Physical Uplink Shared Channel (PUSCH) resource configured to carry the HARQ-ACK and a PDSCH corresponding to the HARQ-ACK is not greater than a preset interval threshold.

23. The method of claim 1, wherein:

the preset rules include: whether a time interval between a PUCCH resource or a PUSCH resource configured to carry the HARQ-ACK and a PDCCH based on a PDSCH corresponding to the HARQ-ACK is not greater than a preset interval threshold value.

24. The method of any of claims 22 to 23, wherein:

the preset interval threshold is indicated by the received DCI or configured by Radio Resource Control (RRC).

25. The method of claim 24, wherein:

the PUCCH resource is indicated by DCI comprising a value K1; and is

The HARQ-ACK is according to a PDSCH scheduled by DCI including non-value K1.

26. A wireless communication device comprising a processor and a memory, wherein the processor is configured to read a code from the memory and implement the method of any of claims 1 to 25.

27. A computer program product comprising a computer readable program medium code stored thereon, which when executed by a processor, causes the processor to implement the method of any one of claims 1 to 25.